Chair.



' m1. 700,067,. v Patented ma l3, l9 02.-

' .1. F. Moons.

CHAIR.

(Application filed. m 25. 1901.) (No Model.)

ghweurbz v z/ Jmes Fefifaafa.

TYNE "aims mzas c0, PHOTO-Lima. wqumsrump, q

UNITED STATES:

PATENT OFFICE.

JAMES F. MOORE, OF FAIRLAND, INDIAN TERRITORY.

CHAIR.

SPECIFICATION forming part of Letters Patent No. 700,067, dated May 13,1902.

Application filed May 25,1901. erial No- 6l,9l 8. (N model.)

To all whmn it may concern.-

Be itknown that 1, Litres F. Moons, a citizen of the United States,residing at Fairland, Cherokee Nation, Indian Territory, have inventednew and useful Improvements in Chairs, of which the following is aspecification.

This invention relates to chairs, and particularly to that class ofchairs in'which a hinged and yielding back is employed.

The object of the present invention is to provide means whereby the backof an ordinary chair may be pivotally mounted with relation to thechair-seat and supported by means of a spring-cushion, which will allowthe chair-back to yield, thereby rendering the chair more comfortable inuse and adapting the chair particularly for the operators oftype-writers and other machines, the back of a chair forming a brace andyielding support for the back of the operator while manipulating themachine.

A further object of theinvention is to provide means for locking theback-cushioning device, so as to hold the back rigid.

Other objects and advantages of the invention will appear more fully inthe course of the ensuing description.

In the accompanying drawings, Figure 1 is a front elevation of a chairconstructed in accordance with the present invention. Fig. 2 is a sideelevation of the same. Fig. 3 is a vertical sectional view of the chair.Fig. l

is a plan view showing segregated details of the chair-cushioningdevice.

Similar numerals of reference designate corresponding parts in all thefigures.

The present invention is applicable to chairs of ordinary construction,embodyinga chairseat and supporting-legs 11. In carrying out the presentinvention the chair-back 12, which is of ordinary. construction,has'the' side arms thereof pivotallyconnected at their lower ends, as at13, to upwardly-projecting extensions 14 of the rear legs orchair-bottom, so that the chair-back may be swung forward or rearward togive it the desired inclination with respect to the chair-bottom. Alever 15 has its upper end rigidly connected to the chair-back by meansof a clamp 15, which is shown as secured to one of the horizontal orcross rails 16 of the chair-back, while the opposite end of said leveris pivotally connected'at 17 to a plunger 18, provided intermedivate'itsendswith an enlarged shoulder 19 and formed beyond such shoulder with arack extension 20, provided with a number of notches 21, the purpose ofwhich will herein- .is normally urged outward by means of a coil-spring24, which surrounds the rack eX- -tension 20 and bears against theshoulder 19 of the plunger, the expansive properties of the springserving to normally hold the plunger outward and the back of the chairin a substantially vertical position.

In order to lock the plunger and render the spring inactive, the tube 22is provided with a notch 25, inwhich operates the nose or point of alatch 26 of elbow shapepivotally connected at 27 to a bracket or lugdepending from pl anger-tube onthe bottom of the chairseat, said latchhaving pivotally connected thereto at 28 a latch-operating rod 29, whichpasses through a" guide 30 on the bottom of the chair and is provided atits outer extremity with a button or operating-head 31, against whichoperates a small coil-spring 32, which holds the operating-rodnormallyoutward, so as to maintain the engagement between the point of the latchand any desired notch in the rack extension 20 of the plunger.

From the foregoing description it will be seen that when the latch isthrown out of operation the back of the chair is adapted to yieldautomatically under the pressure of the back of the person sitting inthe chair, the chair-back forming an efficient yielding support andbrace for the back of the operator. At the same time the chair-backmay-bead- It will be understood that after the latch i 2G'h'asbeen'placed in engagen lent'with oneof the notches 21 the'b'ack cannot swingforward until the plunger '18 is released; The

' removed therefrom the plunger will slide back until stopped by thelatch. I I to ment of the back, and as'soon as pressure is,

'It will be'ohvious that some slight modifications may bemadeinthegeneral construction and arrangement of parts described \vith-,

out materially affecting results,and I desire I it understoodthat'thongh I prefer this particular form equivalent means may be usedwithout departing from the spirit and scope of my invention I I IHaving'th'us'fullypdescribed niyinven'tion;

' what I claim as new,,and desire to secure by I I I I intothe tube, aspring-controlled latch open,

Letters Patent, -i

' '1. 'The combination with a chair-bottom anda' back hinged thereto; ofa lever rigidly connected to the hack, a plunger, pivotally connected tothe lever and located beneath the chair-bottonna spring for forcing theplunger backward, and means whereby the plun-,

ger is permitted to move in one direction but I not in the other.

2. The combination: with a chair-bottom, and a back hinged thereto; ofalever rigidly,

' permits theplnngerto move in one connected to the back, a. plungerpivotally connected to the lever and located beneath slidabl'y'mountedin the tube, a spring for forcing the plunger and its extension in one II I direction, a pivoted latch normally projecting into'the tube, andmeans whereby said latch but, not'in the otherz 3. The combination witha the chair-bottom, a plunger-tube secured to I I I the chair-bottom; anextension to the plunger direction "4 chair-bottom, Iandabackhingedthereto;ofaleverrigidly I I I connected tothe baclgaplungerpivotaHy the chair-bottom, aplunger-tube secured to ating andreleasingrod extending to the edge of thechair-seat, and meanswherebythelatch permits theplungerto movein one direction I I but not'inthe other. I I

In testimony whereof I affix my signature ,in presence oftwo witnesses.

I I I JAMES F. MOORE.

Witnesses:

, S. 0 FULLERTON, I, J. F. RoBIusoN,

